[feat] add ci config

.drone.yml

@@ -0,0 +1,19 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: test
+    image: node:lts
+    commands:
+      - npm i
+      - npm test
+    when:
+      ref:
+        - refs/heads/**
+trigger:
+  ref:
+    include:
+      - refs/heads/**
+      - refs/tags/**